not just lemon jelly
Another good song to play when you're crazy busy at work is "Music Gets the Best of Me" by Sophie Ellis Bextor. Yes, she does have a big moon face but any song that gets me chair dancing is okay by me.
I just did a "Jack" a few minutes ago - started grooving in my chair with my headphones on, then (inadvertently) loudly swore at my screen. It's just like old times except I don't work with Jack anymore and now my workmates think I'm insane.